EP1926163A1 - A negative active material, a method of preparing the same, and a rechargeable lithium battery including the same - Google Patents
A negative active material, a method of preparing the same, and a rechargeable lithium battery including the same Download PDFInfo
- Publication number
- EP1926163A1 EP1926163A1 EP07121149A EP07121149A EP1926163A1 EP 1926163 A1 EP1926163 A1 EP 1926163A1 EP 07121149 A EP07121149 A EP 07121149A EP 07121149 A EP07121149 A EP 07121149A EP 1926163 A1 EP1926163 A1 EP 1926163A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- group
- active material
- lithium
- negative active
- combinations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007773 negative electrode material Substances 0.000 title claims abstract description 80
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 76
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 22
- 239000011247 coating layer Substances 0.000 claims abstract description 37
- 125000000524 functional group Chemical group 0.000 claims abstract description 31
- 239000011149 active material Substances 0.000 claims abstract description 27
- 125000001188 haloalkyl group Chemical group 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- 125000003118 aryl group Chemical group 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 14
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 14
- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- 238000006056 electrooxidation reaction Methods 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 239000002243 precursor Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 36
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 25
- 229910001416 lithium ion Inorganic materials 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 20
- 239000003960 organic solvent Substances 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 claims description 10
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- 238000009830 intercalation Methods 0.000 claims description 8
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 229910052712 strontium Inorganic materials 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000009831 deintercalation Methods 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 5
- RLTFLELMPUMVEH-UHFFFAOYSA-N [Li+].[O--].[O--].[O--].[V+5] Chemical compound [Li+].[O--].[O--].[O--].[V+5] RLTFLELMPUMVEH-UHFFFAOYSA-N 0.000 claims description 5
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- 238000006243 chemical reaction Methods 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 7
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- 159000000002 lithium salts Chemical class 0.000 description 5
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- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- YCOXTKKNXUZSKD-UHFFFAOYSA-N as-o-xylenol Natural products CC1=CC=C(O)C=C1C YCOXTKKNXUZSKD-UHFFFAOYSA-N 0.000 description 1
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229920005994 diacetyl cellulose Polymers 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Chemical group CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229940071826 hydroxyethyl cellulose Drugs 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- SNHMUERNLJLMHN-UHFFFAOYSA-N iodobenzene Chemical compound IC1=CC=CC=C1 SNHMUERNLJLMHN-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- KQNPFQTWMSNSAP-UHFFFAOYSA-N isobutyric acid Chemical compound CC(C)C(O)=O KQNPFQTWMSNSAP-UHFFFAOYSA-N 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- DEUISMFZZMAAOJ-UHFFFAOYSA-N lithium dihydrogen borate oxalic acid Chemical compound B([O-])(O)O.C(C(=O)O)(=O)O.C(C(=O)O)(=O)O.[Li+] DEUISMFZZMAAOJ-UHFFFAOYSA-N 0.000 description 1
- 229910001547 lithium hexafluoroantimonate(V) Inorganic materials 0.000 description 1
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 1
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Inorganic materials [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 1
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001537 lithium tetrachloroaluminate Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- JYVXNLLUYHCIIH-LURJTMIESA-N mevalonolactone Chemical compound C[C@]1(O)CCOC(=O)C1 JYVXNLLUYHCIIH-LURJTMIESA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- GHZRKQCHJFHJPX-UHFFFAOYSA-N oxacycloundecan-2-one Chemical compound O=C1CCCCCCCCCO1 GHZRKQCHJFHJPX-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- FOWDZVNRQHPXDO-UHFFFAOYSA-N propyl hydrogen carbonate Chemical compound CCCOC(O)=O FOWDZVNRQHPXDO-UHFFFAOYSA-N 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
Classifications
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- H01M4/00—Electrodes
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/006—Compounds containing, besides vanadium, two or more other elements, with the exception of oxygen or hydrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/006—Compounds containing, besides chromium, two or more other elements, with the exception of oxygen or hydrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/006—Compounds containing, besides molybdenum, two or more other elements, with the exception of oxygen or hydrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
- C01G41/006—Compounds containing, besides tungsten, two or more other elements, with the exception of oxygen or hydrogen
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/02—Details
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/60—Selection of substances as active materials, active masses, active liquids of organic compounds
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same.
- a lithium rechargeable battery has recently drawn attention as a power source of a small portable electronic device. It uses an organic electrolyte solution and thereby has a discharge voltage that is twice as high as a conventional battery using an alkali aqueous solution, and accordingly has a high energy density.
- a negative active material for a lithium battery can reversibly receive and supply lithium ions while maintaining its structural and electrical properties.
- a lithium metal, a lithium-containing alloy, or a carbon-based material with a potential that is similar to lithium metal when lithium ions are intercalated/deintercalated is usually used.
- a battery using lithium metal or a lithium alloy as a negative active material is called a lithium metal battery, and a battery using a carbon material is called a lithium ion battery.
- a lithium metal battery using lithium metal or a lithium alloy as its negative electrode has a risk of explosion due to a dendrite-short-circuit.
- the lithium metal battery is being replaced by a lithium ion battery that uses a carbon material as its negative active material and does not have such a risk.
- the lithium ion battery transfers only lithium ions during charge/ discharge, and it maintains the electrode active material as it is.
- the lithium ion battery has improved stability and cycle-life.
- a non-aqueous system in which polyvinylidene fluoride (polyvinylidene difluoride or PVDF) is dissolved in N-methyl-2-pyrrolidone (NMP) or an organic acetone solvent is usually used as a binder for a conventional negative electrode plate.
- NMP N-methyl-2-pyrrolidone
- organic solvent such as NMP and acetone may contaminate the natural environment.
- the organic solvent is expensive, the manufacturing cost for a lithium battery is increased.
- an anti-explosion unit is additionally required.
- SBR styrene-butadiene rubber
- CMC carboxymethylcellulose
- the high surface tension of the aqueous solvent deteriorates the coating property of a negative active material slurry to thereby reduce the planarity of a negative electrode.
- the low planarity of the negative electrode makes the surface of the negative electrode non-uniform to thereby reduce a reaction surface area and deteriorate the cycle-life characteristic.
- the present invention provides a negative active material for a rechargeable lithium battery that can improve stability at the interface between a negative electrode and an electrolyte, be applied with an aqueous binder as well as a non-aqueous binder, and improve high capacity, good cycle-life, and particularly high capacity during charge and discharge at a high rate, and a method of preparing the negative active material.
- the present invention also provides a rechargeable lithium battery including the negative active material and having high capacity and excellent cycle-life and particularly high capacity during charge and discharge at a high rate.
- a negative active material for a rechargeable lithium battery that includes a core including an active material capable of performing reversible electrochemical oxidation and reduction, and a coating layer on the surface of the core.
- the coating layer includes a reticular structure including - O-M-O- wherein M is selected from Si, Ti, Zr, Al, or combinations thereof, and an organic functional group linked to the M as a side chain.
- the organic functional group is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof.
- the substituted aryl group may be an aryl group substituted by at least one functional group selected from the group consisting of an alkyl group and a haloalkyl group.
- the organic functional group may be selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof.
- the aryl group may be benzyl, phenyl, or tolyl.
- the coating layer may have a thickness of 20 nm or less. According to one embodiment, the coating layer has a thickness of 10 nm or less. According to another embodiment, the coating layer has a thickness ranging from 5 to 10 nm.
- the active material may be a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, and a material being capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- the active material may be selected from the group consisting of crystalline carbon; amorphous carbon; Si, silicon oxide, Sn; tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, lithium vanadium oxide, and a lithium-containing alloy including at least one metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe, Sn, and combinations thereof.
- the active material may be a compound represented by the following Formula 1: [Chemical Formula 1] Li x M' y V z O 2+d wherein, in the above formula, 0.1 ⁇ x ⁇ 2.5, 0 ⁇ y ⁇ 0.5, 0.5 ⁇ z ⁇ 1.5, 0 ⁇ d ⁇ 0.5, and M' is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof.
- a method of making a negative active material for a rechargeable lithium battery that includes preparing a core liquid by mixing a core material (i.e., an active material) being capable of performing reversible electrochemical oxidation and reduction, an organic solvent, a base, and water; preparing a precursor liquid including an organic-inorganic hybrid precursor including the organic functional group, an organic solvent, and water; and mixing the core liquid and the precursor liquid.
- a core material i.e., an active material
- the organic-inorganic hybrid precursor may be used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the core material. According to one embodiment, the organic-inorganic hybrid precursor is used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the core material. According to another embodiment, the organic-inorganic hybrid precursor is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the core material.
- the base may be aqueous ammonia.
- the core material is used in an amount of 1 to 10 g per 1,000 ml of organic solvent(s) in the mixture of the core liquid and the precursor liquid, the base is used at a concentration of 0.05 to 1M, and the water is used at a concentration of 10 to 20M in the mixture of the core liquid and the precursor liquid.
- a rechargeable lithium battery that includes a negative electrode including the negative active material, a positive electrode including a positive active material, and an electrolyte.
- a negative active material according to the present invention in its first aspect for an electrode of a rechargeable lithium battery.
- the present invention relates to a negative active material for a rechargeable lithium battery that has a core-shell structure.
- the core includes an active material capable of performing reversible electrochemical oxidation and reduction.
- the active material may be a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, a material capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- the material capable of reversibly intercalating and deintercalating lithium ions may be a generally-used carbon-based negative active material such as crystalline carbon, amorphous carbon, and combinations thereof.
- the material capable of reversibly forming a lithium-containing compound by reacting with lithium ions may include Si, silicon oxide, Sn, tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, or a lithium metal oxide such as lithium vanadium oxide.
- the lithium-containing alloy may be an alloy of lithium and a metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe, and Sn.
- the active material is a compound represented by the following Formula 1: [Chemical Formula 1] Li x M' y V z O 2+d wherein, in the above formula, 0.1 ⁇ x ⁇ 2.5, 0 ⁇ y ⁇ 0.5, 0.5 ⁇ z ⁇ 1.5, 0 ⁇ d ⁇ 0.5, and M' is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof.
- the coating layer is disposed on the core, has a reticular structure, and includes a material including an element selected from the group consisting of Si, Ti, Zr, Al, and combinations thereof.
- the core is surrounded by a coating layer including -O-M-O-(wherein M is Si, Ti, Zr, or Al), and an organic functional group linked to the M as a side chain.
- the organic functional group is linked to M and does not link to the core.
- the organic functional group is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof.
- the substituted aryl group may be an aryl substituted by a functional group selected from the group consisting of an alkyl group, a haloalkyl group, and combinations thereof.
- the aryl group may be benzyl, phenyl, or tolyl.
- the organic functional group is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof.
- the coating layer has a nano-sized thickness that can conduct lithium ions, and does not incur resistance.
- the inorganic oxide coating layer has a thickness of 20 nm or less.
- the coating layer has a thickness of 10 nm or less.
- the coating layer has a thickness of 5 to 10 nm.
- the coating layer may act as a resistance layer to reduce transfer speed of electrons and lithium ions into the core active material, resulting in a significant decrease of electrochemical characteristic such as high rate characteristics, cycle-life, and so on.
- FIGURE 1A schematically shows a negative active material for a rechargeable lithium battery according to one embodiment of the present invention.
- the active material 10 has a core-shell structure including the core 20 and the coating layer 30.
- FIGURE 1B is an enlarged view of the coating layer 30 of an exemplary negative active material.
- -O-M-O- linkages surround the surface of the core, and the organic functional group, X, is linked to M as a side chain.
- the active material 10 includes -O-M-O- linkages having a reticular structure 31 disposed on the surface of the core 20, and the organic functional group 32 linked hereto.
- An SEI (solid electrolyte interface) film is formed by electrochemical decomposition of an electrolyte at the interface between an electrolyte and a negative active material in a conventional battery system.
- the - O-M-O- linkages are disposed on the surface of the core to minimize formation of an SEI film during charge and discharge and thereby improve reversible efficiency and cycle-life.
- the negative active material according to one embodiment of the present invention is prepared as follows.
- the core material, an organic solvent, a base, and water are mixed to prepare a core liquid.
- An organic-inorganic hybrid precursor, an organic solvent, and water are mixed to prepare a precursor liquid. Then the core liquid and the precursor liquid are mixed.
- the core liquid and the precursor liquid can be used in an appropriate amount so that the core material might be in an amount of 1 to 10g per 1,000 ml of an organic solvent(s) in the mixture of the core liquid and the precursor liquid, 0.05 to 1M base, and 10 to 20M water in the mixture of the core liquid and the precursor liquid.
- the core liquid and the precursor liquid can be mixed in an appropriate mixing ratio so that the component materials may be within the above range.
- the organic-inorganic hybrid precursor can be included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the core material. According to one embodiment, the organic-inorganic hybrid precursor can be included in an amount of 1 to 20 parts by weight based on 100 parts by weight of the core material. According to another embodiment, the organic-inorganic hybrid precursor can be included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the core material.
- the prepared coating layer may have little effect. On the contrary, when it is included in an amount of more than 30 parts by weight, a thick net-structured membrane is formed, increasing resistance of an electrode.
- the core liquid is prepared by dispersing a core material into an organic solvent, and then adding a base and water to the mixture.
- the core material includes the aforementioned active material.
- the base plays a role of a catalyst promoting a reaction. It can include any base, so far as the base acts as a catalyst promoting a reaction. For example, it may include aqueous ammonia with pH 8 to 9.
- the organic solvent may be selected from the group consisting of methanol, ethanol, propanol, isopropanol, and mixtures thereof.
- the precursor liquid is prepared by mixing an organic-inorganic hybrid precursor, an organic solvent, and water.
- the organic solvent may be selected from the group consisting of methanol, ethanol, propanol, isopropanol, and mixtures thereof.
- the organic-inorganic hybrid precursor may include at least two functional groups participating in a sol-gel reaction, and also one or two functional groups not participating in a sol-gel reaction, which are bound at M therein. According to one embodiment, it may include only one functional group not participating in sol-gel reaction.
- the organic-inorganic hybrid precursor may include a compound represented by the following Formula 2: [Chemical Formula 2] R 1 -M-(OR 2 ) n wherein, in the above formula, M is selected from the group consisting of Si, Ti, Zr, and Al, R 1 is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof, R 2 is a C1 to C7 alkyl group, and n is determined according to a valence of M. According to one embodiment, n ranges from 1 to 6 and in another embodiment, n ranges from 1 to 4.
- R 1 is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof, and R 2 is a C1 to C5 alkyl group.
- the organic-inorganic hybrid precursor represented by the above Formula 2 may include a compound represented by the following Formula 2a.
- a precursor surrounds a core material, they simultaneously have hydrolysis and condensation reactions, through which a coating layer with a reticular structure is formed from the precursor on the surface of the core material.
- a solvent in the reaction is volatilized and then heat-treated, obtaining a negative active material according to the present invention.
- the volatilization process is performed by heat-treating a dispersion at a temperature of 50 to 100 °C. According to another embodiment of the present invention, it may be performed at a temperature of 60 °C.
- the temperature for volatilization can be appropriately changed depending on kinds of alcohol used as a solvent of a dispersion.
- the volatilization is performed at a temperature of lower than 50 °C, the volatilization process may become too long, while when at a temperature of higher than 100 °C, there may be no big different effects, compared with 100°C.
- the heat treatment can be performed at a temperature of 300 to 600 °C.
- the heat treatment is performed at a temperature of lower than 300 °C, impurities may remain inside a core material.
- the coating layer formed in this way may have a thickness of nanometers. According to one embodiment, it may have a thickness of less than 20 nm, and according to another embodiment, it may have a thickness ranging from 5 to 10 nm.
- a coating layer includes an organic functional group, it may have increased miscibility with a binder, which will be used for preparing a composition for an electrode.
- the rechargeable lithium battery includes a negative electrode including the above negative active material, a positive electrode, and an electrolyte.
- the negative electrode includes a current collector and a negative active material layer disposed on the current collector.
- the negative active material layer includes the above negative active material.
- the negative electrode may be fabricated as follows: a composition including the negative active material, a binder, and optionally a conductive agent which are mixed in a solvent is applied on a negative current collector such as copper.
- the negative active material is the same as the above-described. According to one embodiment, the negative active material is included in an amount of 50 to 99 wt% based on the total weight of the negative active material layer. According to another embodiment, the negative active material is included in an amount of 80 to 98 wt% based on the total weight of the negative active material layer. When the amount of the negative active material is less than 50 wt%, battery capacity may be decreased, whereas when it is more than 99 wt%, the relative amount of binder is reduced and thus binding force between the negative active material layer and a current collector may be decreased.
- the amount of the binder ranges from 0.8 to 5 wt% based on a total weight of the negative active material layer. According to one embodiment, the amount of the binder ranges from 1 to 5 wt%. According to another embodiment, the amount of the binder ranges from 1 to 2 wt%. When the amount of the binder is less than 0.8 wt%, binder content is significantly low and adherence between a negative active material and a current collector is not sufficient. On the contrary, when it is more than 5 wt%, the amount of the negative active material is low and thus a high-capacity battery cannot be realized.
- aqueous or non-aqueous binders may be used for the binder.
- aqueous binder For the aqueous binder, at least one selected from the group consisting of styrene-butadiene rubber (SBR), polyvinylalcohol, carboxymethylcellulose, hydroxypropyl cellulose, diacetyl cellulose, and mixtures thereof may be used. Since the aqueous binder can be dispersed in water in the form of an emulsion, it does not have to use an organic solvent. Also, since it is highly adhesive, the amount of the binder to be used can be reduced and the amount of the negative active material can be increased. Therefore, it is advantageous in the manufacture of a high-capacity lithium battery.
- the aqueous binder is used together with water or an aqueous solvent of water and an alcohol solvent.
- a thickener may be added thereto to adjust the viscosity.
- the thickener may be at least one selected from the group consisting of carboxyl methyl cellulose, hydroxymethyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, and combinations thereof.
- the amount of the thickener may range from 0.8 to 5 wt% based on the entire negative active material layer. According to one embodiment, the amount of the thickener may range from 1 to 5 wt% based on the entire negative active material layer. According to another embodiment, the amount of the thickener may range from 1 to 2 wt% based on the entire negative active material layer.
- the amount of the thickener When the amount of the thickener is less than 0.8 wt%, there may be a problem that the negative active material may run during coating. When the amount of the thickener is more than 5 wt%, the viscosity of the negative active material becomes too high for coating and rather it functions as a resistance. Also, when the amount of the thickener is more than 5 wt%, the amount of the negative active material is reduced so that the produced battery may not have particularly high capacity.
- non-aqueous binder examples include at least one selected from the group consisting of polyvinylchloride, polyvinylpyrrolidone, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, and mixtures thereof. These binders are used along with non-aqueous solvents such as N-methyl-2-pyrrolidone (NMP), dimethylformamide, tetrahydrofuran, and mixtures thereof.
- NMP N-methyl-2-pyrrolidone
- dimethylformamide dimethylformamide
- tetrahydrofuran and mixtures thereof.
- any electrically conductive material may be used as a conductive agent unless it causes a chemical change.
- the conductive agent include natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, carbon fiber, a metal powder or a metal fiber including copper, nickel, aluminum, silver, and so on, a polyphenylene derivative, or combinations thereof.
- the current collector may be selected from the group consisting of a copper foil, a nickel foil, a stainless steel foil, a titanium foil, a nickel foam, a copper foam, a polymer substrate coated with a conductive metal, and combinations thereof.
- the positive electrode includes a positive active material that is capable of performing a reversible electrochemical oxidation and reduction and is a generally-used lithiated intercalation compound in a rechargeable lithium battery.
- the lithiated intercalation compound includes compounds of the following Formulas 3 to 26.
- the electrolyte includes a non-aqueous organic solvent and a lithium salt.
- the lithium salt is dissolved in the non-aqueous organic solvent to supply lithium ions in the battery. It may operate a basic operation of a rechargeable lithium battery, and it facilitates transmission of lithium ions between positive and negative electrodes.
- Non-limiting examples of the lithium salt include at least one supporting electrolyte salt selected from the group consisting of LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiCF 3 SO 3 , LiN(SO 2 C 2 F 5 ) 2 , LiN (CF 3 SO 2 ) 2 , LiC 4 F 9 SO 3 , LiClO 4 , LiAlO 2 , LiAlCl 4 , LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 ) (where x and y are natural numbers), LiCl, LiI, and lithium bisoxalate borate.
- the lithium salt may be used at a 0.1 to 2.0M concentration.
- the lithium salt concentration is less than 0.1M, electrolyte performance may be deteriorated due to low electrolyte conductivity, whereas when it is more than 2.0M, lithium ion mobility may be reduced due to an increase of electrolyte viscosity.
- the non-aqueous organic solvent acts as a medium for transmitting ions taking part in the electrochemical reaction of the battery.
- the non-aqueous organic solvent may include, but is not limited to, benzene, toluene, fluorobenzene, 1,2-difluorobenzene, 1,3-difluorobenzene, 1,4-difluorobenzene, 1,2,3-trifluorobenzene, 1,2,4-trifluorobenzene, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, iodobenzene, 1,2-diiodobenzene, 1,3-diiodobenzene, 1,4-diiodobenzene, 1,2,3-triiodobenzene, 1,2,4-triio
- FIGURE 2 shows a rechargeable lithium battery having the above-mentioned structure according to an embodiment.
- the rechargeable lithium battery 3 is composed of an electrode assembly 4 including a positive electrode 5, a negative electrode 6, a separator 7 interposed between the positive electrode 5 and the negative electrode 6 which is positioned in a battery case 8.
- the upper part of the cell case is sealed with a cap plate 11 and a gasket 12.
- the rechargeable lithium battery according to the present embodiment is not limited to the above-mentioned shape, and may be shaped into a prismatic shape, a pouch, and so on.
- the rechargeable lithium battery generally includes a positive electrode, a negative electrode, and an electrolyte.
- the battery may further include a separator as needed.
- the separator may include any material used in conventional lithium secondary batteries.
- suitable separator materials include polyethylene, polypropylene, polyvinylidene fluoride, and multi-layers thereof such as a polyethylene/polypropylene double-layered separator, a polyethylene/polypropylene/polyethylene three-layered separator, and a polypropylene/polyethylene/polypropylene three-layered separator.
- aqueous ammonia prepared by mixing ammonia and water in a volume ratio of 29 : 71 was added to the dispersion. They were then uniformly mixed to prepare a core liquid.
- a precursor liquid was prepared by adding 10 parts by weight of a compound represented by the following Formula 2a based on 100 parts by weight of the core material to 1 mL of ethanol and 1 mL of water.
- the prepared precursor liquid was rapidly added to the core liquid to perform a hydrolysis and condensation reaction.
- the reaction solution was heated at 60 °C to volatilize ethanol, and then heat-treated at 450 °C to prepare a negative active material including a 8 nm-thick coating layer on the surface of silicon.
- the coating layer included as a core Si-O- was bounded with the core material, and a p-methyl phenyl group was positioned on a Si side chain that was not bonded with the core material.
- a negative active material was prepared to have a 12 nm-thick coating layer on the surface of the silicon according to the same method as in Example 1, except that 30 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- a negative active material was prepared to have a 19 nm-thick coating layer on the surface of the silicon according to the same method as in Example 1, except that 50 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- a negative active material was prepared to have a 9 nm-thick coating layer according to the same method as in Example 1, except that Li 1.1 Ti 0.1 V 0.9 O 2 (10 mm) was used as a core material instead of silicon.
- a negative active material was prepared to have an 11 nm-thick coating layer according to the same method as in Example 4, except that 30 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- a negative active material was prepared to have a 20 nm-thick coating layer according to the same method as in Example 4, except that 50 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- Silicon was used as a negative active material.
- Li 1.1 Ti 0.1 V 0.9 O 2 was used as a negative active material.
- the negative active material prepared according to the Example 1 was examined regarding structure of the coating layer by measuring FT-IR (Fourier Transform Infrared Spectroscopy) spectra. The results are shown in FIGURE 3.
- FT-IR Fastier Transform Infrared Spectroscopy
- FIGURE 3 showed FT-IR spectra of the negative active material prepared according to Example 1.
- the coating layer on the surface of negative active material prepared according to Example 1 had a -O-Si-O reticular structure formed from an organic-inorganic hybrid precursor.
- a lithium cobalt oxide (LiCoO 2 ) positive active material and carbon black as a conductive agent were mixed to prepare a mixture.
- a polyvinylidene fluoride binder was dissolved in an N-methyl-2-pyrrolidone solvent to prepare a binder solution.
- the mixture was added to the binder solution to prepare a positive active material slurry.
- the prepared positive active material slurry was coated to be 20 ⁇ m thick on an aluminum foil in a doctor blade method, dried at 120 °C for 10 hours under a vacuum atmosphere to volatilize N-methyl-2-pyrrolidone, and pressed to fabricate a positive electrode.
- negative active materials prepared according to Examples 1 to 6 and carbon black conductive agents were added to an N-methylpyrrolidone solution, in which a polyvinylidene fluoride binder was dissolved, to prepare negative active material slurries.
- the prepared negative active material slurries were respectively coated to be 12 ⁇ m thick on a copper foil in a doctor blade method, dried at 120 °C for 10 hours under a vacuum atmosphere to volatilize N-methyl-2-pyrrolidone, and pressed to fabricate negative electrodes.
- rechargeable lithium battery cells were fabricated using the positive and negative electrodes and a polyolefin (polyethylene and polypropylene) separator.
- the rechargeable lithium battery cells including the negative active materials according to the Examples 1 to 6 and Comparative Examples 1 and 2 were charged up to 4.2 V and discharged down to 2.75 V at 0.2C. Then, their coulomb efficiency was measured to estimate their initial reversible efficiency. The results are shown in the following Table 1. Table 1 Coulomb Efficiency Example 1 80.5 % Example 2 81.8 % Example 3 77.0% Example 4 91.8% Example 5 90.0% Example 6 87.5% Comparative Example 1 72.0% Comparative Example 2 86.0%
- a negative active material of the present invention includes an inorganic oxide coating layer on the surface, and can thereby minimize interface reactivity between a negative electrode and an electrolyte during the operation of a battery cell, improving charge and discharge efficiency and cycle-life characteristic of a rechargeable lithium battery cell.
- the rechargeable lithium battery cells including the negative active materials according to the Examples 2 and 4 and Comparative Examples 1 and 2 were charged up to 4.2 V at 0.2C and discharged up to 3.0 V at 0.2C. The charge and discharge was 50 times repeated. The results are shown in the FIGURE 4.
- capacity retention after 50th charge and discharge means the ratio of the 50th charge and discharge capacity verse the first charge and discharge capacity.
- FIGURE 4 is a graph showing capacity retention of the cells of Examples 2 and 4 and Comparative Examples 1 and 2 during 50 charges and discharges.
- the battery cells according to Examples 2 and 4 of the present invention which included a negative active material including a coating layeron the surface after 50 charges and discharges, turned out to have a lower decreasing capacity rate than the ones according to Comparative Examples 1 and 2.
- a negative active material for a rechargeable lithium battery according to the present invention can be applied along with an aqueous binder, and improve high capacity, good cycle-life, and particularly high capacity during charge and discharge at a high rate.
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Abstract
Description
- The present invention relates to a negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same.
- A lithium rechargeable battery has recently drawn attention as a power source of a small portable electronic device. It uses an organic electrolyte solution and thereby has a discharge voltage that is twice as high as a conventional battery using an alkali aqueous solution, and accordingly has a high energy density.
- A negative active material for a lithium battery can reversibly receive and supply lithium ions while maintaining its structural and electrical properties. For the negative active material, a lithium metal, a lithium-containing alloy, or a carbon-based material with a potential that is similar to lithium metal when lithium ions are intercalated/deintercalated is usually used. A battery using lithium metal or a lithium alloy as a negative active material is called a lithium metal battery, and a battery using a carbon material is called a lithium ion battery.
- A lithium metal battery using lithium metal or a lithium alloy as its negative electrode has a risk of explosion due to a dendrite-short-circuit. Hence, the lithium metal battery is being replaced by a lithium ion battery that uses a carbon material as its negative active material and does not have such a risk. The lithium ion battery transfers only lithium ions during charge/ discharge, and it maintains the electrode active material as it is. Thus, the lithium ion battery has improved stability and cycle-life.
- In the lithium ion battery, a non-aqueous system in which polyvinylidene fluoride (polyvinylidene difluoride or PVDF) is dissolved in N-methyl-2-pyrrolidone (NMP) or an organic acetone solvent is usually used as a binder for a conventional negative electrode plate. However, when the PVDF/NMP non-aqueous system is used as a binder, the organic solvent such as NMP and acetone may contaminate the natural environment. Also, since the organic solvent is expensive, the manufacturing cost for a lithium battery is increased. In addition, since most organic solvents are highly volatile, there is a risk of explosion when they are used in an enclosed space. To prevent explosions, an anti-explosion unit is additionally required.
- To overcome the problems, researchers are actively studying to develop a method of using an aqueous system in which styrene-butadiene rubber (SBR) is dispersed in water along with a thickener, e.g., carboxymethylcellulose (CMC), when a negative electrode plate is manufactured. Since the SBR binder can be dispersed in water in the form of emulsion, it does not have to use an organic solvent, and the SBR binder has strong adherence. With the SBR binder, the amount of a binder is reduced and the amount of a negative active material is increased, which is advantageous in manufacturing a high-capacity lithium battery.
- When an aqueous solvent is used with an aqueous binder, the high surface tension of the aqueous solvent deteriorates the coating property of a negative active material slurry to thereby reduce the planarity of a negative electrode. The low planarity of the negative electrode makes the surface of the negative electrode non-uniform to thereby reduce a reaction surface area and deteriorate the cycle-life characteristic.
- The present invention provides a negative active material for a rechargeable lithium battery that can improve stability at the interface between a negative electrode and an electrolyte, be applied with an aqueous binder as well as a non-aqueous binder, and improve high capacity, good cycle-life, and particularly high capacity during charge and discharge at a high rate, and a method of preparing the negative active material.
- The present invention also provides a rechargeable lithium battery including the negative active material and having high capacity and excellent cycle-life and particularly high capacity during charge and discharge at a high rate.
- According to a first aspect of the present invention, there is provided a negative active material for a rechargeable lithium battery that includes a core including an active material capable of performing reversible electrochemical oxidation and reduction, and a coating layer on the surface of the core. The coating layer includes a reticular structure including - O-M-O- wherein M is selected from Si, Ti, Zr, Al, or combinations thereof, and an organic functional group linked to the M as a side chain.
- The organic functional group is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof.
- The substituted aryl group may be an aryl group substituted by at least one functional group selected from the group consisting of an alkyl group and a haloalkyl group.
- The organic functional group may be selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof. The aryl group may be benzyl, phenyl, or tolyl.
- The coating layer may have a thickness of 20 nm or less. According to one embodiment, the coating layer has a thickness of 10 nm or less. According to another embodiment, the coating layer has a thickness ranging from 5 to 10 nm.
- The active material may be a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, and a material being capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- The active material may be selected from the group consisting of crystalline carbon; amorphous carbon; Si, silicon oxide, Sn; tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, lithium vanadium oxide, and a lithium-containing alloy including at least one metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe, Sn, and combinations thereof.
- The active material may be a compound represented by the following Formula 1:
[Chemical Formula 1] LixM'yVzO2+d
wherein, in the above formula, 0.1 ≤ x ≤ 2.5, 0 ≤ y ≤ 0.5, 0.5 ≤ z ≤ 1.5, 0 ≤ d ≤ 0.5, and M' is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof. - According to another aspect of the present invention, there is provided a method of making a negative active material for a rechargeable lithium battery that includes preparing a core liquid by mixing a core material (i.e., an active material) being capable of performing reversible electrochemical oxidation and reduction, an organic solvent, a base, and water; preparing a precursor liquid including an organic-inorganic hybrid precursor including the organic functional group, an organic solvent, and water; and mixing the core liquid and the precursor liquid.
- The organic-inorganic hybrid precursor may be used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the core material. According to one embodiment, the organic-inorganic hybrid precursor is used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the core material. According to another embodiment, the organic-inorganic hybrid precursor is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the core material.
- The base may be aqueous ammonia. In an embodiment, the core material is used in an amount of 1 to 10 g per 1,000 ml of organic solvent(s) in the mixture of the core liquid and the precursor liquid, the base is used at a concentration of 0.05 to 1M, and the water is used at a concentration of 10 to 20M in the mixture of the core liquid and the precursor liquid.
- According to yet another aspect of the present invention, there is provided a rechargeable lithium battery that includes a negative electrode including the negative active material, a positive electrode including a positive active material, and an electrolyte.
- According to a further aspect of the present invention, there is provided the use of a negative active material according to the present invention in its first aspect for an electrode of a rechargeable lithium battery.
- A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings, wherein:
- FIGURE 1A and 1B schematically show a negative active material for a rechargeable lithium battery according to one embodiment of the present invention;
- FIGURE 2 schematically shows a rechargeable lithium battery according to one embodiment of the present invention;
- FIGURE 3 shows a spectrum of the negative active material according to Example 1 measured by a Fourier Transform Infrared (FT-IR) spectrometer; and
- FIGURE 4 is a graph showing capacity retention of the cells according to Examples 2 and 4, and Comparative Examples 1 and 2 after 50 charges and discharges.
- The present invention relates to a negative active material for a rechargeable lithium battery that has a core-shell structure.
- The core includes an active material capable of performing reversible electrochemical oxidation and reduction. The active material may be a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, a material capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- The material capable of reversibly intercalating and deintercalating lithium ions may be a generally-used carbon-based negative active material such as crystalline carbon, amorphous carbon, and combinations thereof.
- The material capable of reversibly forming a lithium-containing compound by reacting with lithium ions may include Si, silicon oxide, Sn, tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, or a lithium metal oxide such as lithium vanadium oxide.
- The lithium-containing alloy may be an alloy of lithium and a metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe, and Sn.
- According to one embodiment of the present invention, the active material is a compound represented by the following Formula 1:
[Chemical Formula 1] LixM'yVzO2+d
wherein, in the above formula, 0.1 ≤ x ≤ 2.5, 0 ≤ y ≤ 0.5, 0.5 ≤ z ≤ 1.5, 0 ≤ d ≤ 0.5, and M' is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof. - The coating layer is disposed on the core, has a reticular structure, and includes a material including an element selected from the group consisting of Si, Ti, Zr, Al, and combinations thereof. In particular, the core is surrounded by a coating layer including -O-M-O-(wherein M is Si, Ti, Zr, or Al), and an organic functional group linked to the M as a side chain. The organic functional group is linked to M and does not link to the core.
- The organic functional group is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof. The substituted aryl group may be an aryl substituted by a functional group selected from the group consisting of an alkyl group, a haloalkyl group, and combinations thereof. The aryl group may be benzyl, phenyl, or tolyl.
- According to one embodiment of present invention, the organic functional group is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof.
- The coating layer has a nano-sized thickness that can conduct lithium ions, and does not incur resistance. According to one embodiment, the inorganic oxide coating layer has a thickness of 20 nm or less. According to another embodiment, the coating layer has a thickness of 10 nm or less. According to yet another embodiment, the coating layer has a thickness of 5 to 10 nm. When the coating layer has a thickness of more than 20 nm, it may act as a resistance layer to reduce transfer speed of electrons and lithium ions into the core active material, resulting in a significant decrease of electrochemical characteristic such as high rate characteristics, cycle-life, and so on.
- FIGURE 1A schematically shows a negative active material for a rechargeable lithium battery according to one embodiment of the present invention.
- As shown in FIGURE 1A, the
active material 10 has a core-shell structure including thecore 20 and thecoating layer 30. FIGURE 1B is an enlarged view of thecoating layer 30 of an exemplary negative active material. -O-M-O- linkages surround the surface of the core, and the organic functional group, X, is linked to M as a side chain. As shown in FIGURE 1B, theactive material 10 includes -O-M-O- linkages having areticular structure 31 disposed on the surface of the core 20, and the organicfunctional group 32 linked hereto. - An SEI (solid electrolyte interface) film is formed by electrochemical decomposition of an electrolyte at the interface between an electrolyte and a negative active material in a conventional battery system. According to one embodiment of the present invention, the - O-M-O- linkages are disposed on the surface of the core to minimize formation of an SEI film during charge and discharge and thereby improve reversible efficiency and cycle-life.
- The negative active material according to one embodiment of the present invention is prepared as follows.
- The core material, an organic solvent, a base, and water are mixed to prepare a core liquid. An organic-inorganic hybrid precursor, an organic solvent, and water are mixed to prepare a precursor liquid. Then the core liquid and the precursor liquid are mixed.
- The core liquid and the precursor liquid can be used in an appropriate amount so that the core material might be in an amount of 1 to 10g per 1,000 ml of an organic solvent(s) in the mixture of the core liquid and the precursor liquid, 0.05 to 1M base, and 10 to 20M water in the mixture of the core liquid and the precursor liquid.
- The core liquid and the precursor liquid can be mixed in an appropriate mixing ratio so that the component materials may be within the above range. The organic-inorganic hybrid precursor can be included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the core material. According to one embodiment, the organic-inorganic hybrid precursor can be included in an amount of 1 to 20 parts by weight based on 100 parts by weight of the core material. According to another embodiment, the organic-inorganic hybrid precursor can be included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the core material. When an organic-inorganic hybrid precursor is included in an amount of less than 1 part by weight, the prepared coating layer may have little effect. On the contrary, when it is included in an amount of more than 30 parts by weight, a thick net-structured membrane is formed, increasing resistance of an electrode.
- The core liquid is prepared by dispersing a core material into an organic solvent, and then adding a base and water to the mixture.
- The core material includes the aforementioned active material.
- The base plays a role of a catalyst promoting a reaction. It can include any base, so far as the base acts as a catalyst promoting a reaction. For example, it may include aqueous ammonia with pH 8 to 9.
- The organic solvent may be selected from the group consisting of methanol, ethanol, propanol, isopropanol, and mixtures thereof.
- The precursor liquid is prepared by mixing an organic-inorganic hybrid precursor, an organic solvent, and water. Herein, the organic solvent may be selected from the group consisting of methanol, ethanol, propanol, isopropanol, and mixtures thereof.
- The organic-inorganic hybrid precursor may include at least two functional groups participating in a sol-gel reaction, and also one or two functional groups not participating in a sol-gel reaction, which are bound at M therein. According to one embodiment, it may include only one functional group not participating in sol-gel reaction.
- The organic-inorganic hybrid precursor may include a compound represented by the following Formula 2:
[Chemical Formula 2] R1-M-(OR2)n
wherein, in the above formula, M is selected from the group consisting of Si, Ti, Zr, and Al, R1 is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof, R2 is a C1 to C7 alkyl group, and n is determined according to a valence of M. According to one embodiment, n ranges from 1 to 6 and in another embodiment, n ranges from 1 to 4. - According to one embodiment of the present invention, R1 is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof, and R2 is a C1 to C5 alkyl group.
- The organic-inorganic hybrid precursor represented by the
above Formula 2 may include a compound represented by the following Formula 2a. - Next, a solvent in the reaction is volatilized and then heat-treated, obtaining a negative active material according to the present invention.
- Herein, the volatilization process is performed by heat-treating a dispersion at a temperature of 50 to 100 °C. According to another embodiment of the present invention, it may be performed at a temperature of 60 °C. The temperature for volatilization can be appropriately changed depending on kinds of alcohol used as a solvent of a dispersion. When the volatilization is performed at a temperature of lower than 50 °C, the volatilization process may become too long, while when at a temperature of higher than 100 °C, there may be no big different effects, compared with 100°C.
- In addition, the heat treatment can be performed at a temperature of 300 to 600 °C. When the heat treatment is performed at a temperature of lower than 300 °C, impurities may remain inside a core material. On the contrary, when performed at a temperature of higher than 600 °C, it may not be economical.
- The coating layer formed in this way may have a thickness of nanometers. According to one embodiment, it may have a thickness of less than 20 nm, and according to another embodiment, it may have a thickness ranging from 5 to 10 nm. When a coating layer includes an organic functional group, it may have increased miscibility with a binder, which will be used for preparing a composition for an electrode.
- The rechargeable lithium battery includes a negative electrode including the above negative active material, a positive electrode, and an electrolyte.
- The negative electrode includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes the above negative active material.
- The negative electrode may be fabricated as follows: a composition including the negative active material, a binder, and optionally a conductive agent which are mixed in a solvent is applied on a negative current collector such as copper.
- The negative active material is the same as the above-described. According to one embodiment, the negative active material is included in an amount of 50 to 99 wt% based on the total weight of the negative active material layer. According to another embodiment, the negative active material is included in an amount of 80 to 98 wt% based on the total weight of the negative active material layer. When the amount of the negative active material is less than 50 wt%, battery capacity may be decreased, whereas when it is more than 99 wt%, the relative amount of binder is reduced and thus binding force between the negative active material layer and a current collector may be decreased.
- The amount of the binder ranges from 0.8 to 5 wt% based on a total weight of the negative active material layer. According to one embodiment, the amount of the binder ranges from 1 to 5 wt%. According to another embodiment, the amount of the binder ranges from 1 to 2 wt%. When the amount of the binder is less than 0.8 wt%, binder content is significantly low and adherence between a negative active material and a current collector is not sufficient. On the contrary, when it is more than 5 wt%, the amount of the negative active material is low and thus a high-capacity battery cannot be realized.
- Herein, aqueous or non-aqueous binders may be used for the binder.
- For the aqueous binder, at least one selected from the group consisting of styrene-butadiene rubber (SBR), polyvinylalcohol, carboxymethylcellulose, hydroxypropyl cellulose, diacetyl cellulose, and mixtures thereof may be used. Since the aqueous binder can be dispersed in water in the form of an emulsion, it does not have to use an organic solvent. Also, since it is highly adhesive, the amount of the binder to be used can be reduced and the amount of the negative active material can be increased. Therefore, it is advantageous in the manufacture of a high-capacity lithium battery. The aqueous binder is used together with water or an aqueous solvent of water and an alcohol solvent.
- When an aqueous binder is used, a thickener may be added thereto to adjust the viscosity. The thickener may be at least one selected from the group consisting of carboxyl methyl cellulose, hydroxymethyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, and combinations thereof. The amount of the thickener may range from 0.8 to 5 wt% based on the entire negative active material layer. According to one embodiment, the amount of the thickener may range from 1 to 5 wt% based on the entire negative active material layer. According to another embodiment, the amount of the thickener may range from 1 to 2 wt% based on the entire negative active material layer.
- When the amount of the thickener is less than 0.8 wt%, there may be a problem that the negative active material may run during coating. When the amount of the thickener is more than 5 wt%, the viscosity of the negative active material becomes too high for coating and rather it functions as a resistance. Also, when the amount of the thickener is more than 5 wt%, the amount of the negative active material is reduced so that the produced battery may not have particularly high capacity.
- Examples of the non-aqueous binder include at least one selected from the group consisting of polyvinylchloride, polyvinylpyrrolidone, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, and mixtures thereof. These binders are used along with non-aqueous solvents such as N-methyl-2-pyrrolidone (NMP), dimethylformamide, tetrahydrofuran, and mixtures thereof.
- Any electrically conductive material may be used as a conductive agent unless it causes a chemical change. Examples of the conductive agent include natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, carbon fiber, a metal powder or a metal fiber including copper, nickel, aluminum, silver, and so on, a polyphenylene derivative, or combinations thereof.
- The current collector may be selected from the group consisting of a copper foil, a nickel foil, a stainless steel foil, a titanium foil, a nickel foam, a copper foam, a polymer substrate coated with a conductive metal, and combinations thereof.
- The positive electrode includes a positive active material that is capable of performing a reversible electrochemical oxidation and reduction and is a generally-used lithiated intercalation compound in a rechargeable lithium battery. The lithiated intercalation compound includes compounds of the following
Formulas 3 to 26.
[Chemical Formula 3] LiaA1-bBbD2
wherein, in the above formula, 0.95 ≤ a ≤ 1.1 and 0 ≤ b ≤ 0.5.
[Chemical Formula 4] LiaE1-bBbO2-cFc
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, and 0 ≤ c ≤ 0.05.
[Chemical Formula 5] LiE2-bBbO4-cFc
wherein, in the above formula, 0 ≤ b ≤ 0.5 and 0 ≤ c ≤ 0.05.
[Chemical Formula 6] LiaNi1-b-cCobBcDα
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α ≤ 2.
[Chemical Formula 7] LiaNi1-b-cCobBcO2-αFα
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α < 2.
[Chemical Formula 8] LiaNi1-b-cCobBcO2-αF2
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α < 2.
[Chemical Formula 9] LiaNi1-b-cMnbBcDα
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α ≤ 2.
[Chemical Formula 10] LiaNi1-b-cMnbBcO2-αFα
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α < 2.
[Chemical Formula 11] LiaNi1-b-cMnbBcO2-αF2
wherein, in the above formula, 0.95 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, and 0 < α < 2.
[Chemical Formula 12] LiaNibEcGdO2
wherein, in the above formula, 0.90 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.9, and 0.001 ≤ d ≤ 0.2.
[Chemical Formula 13] LiaNibCocMndGeO2
wherein, in the above formula, 0.90 ≤ a ≤ 1.1, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0 ≤ d ≤ 0.5, and 0.001 ≤ e ≤ 0.2.
[Chemical Formula 14] LiaNiGbO2
wherein, in the above formula, 0.90 ≤ a ≤ 1.1 and 0.001 ≤ b ≤ 0.1.
[Chemical Formula 15] LiaCoGbO2
wherein, in the above formula, 0.90 ≤ a ≤ 1.1 and 0.001 ≤ b ≤ 0.1.
[Chemical Formula 16] LiaMnGbO2
wherein, in the above formula, 0.90 ≤ a ≤ 1.1 and 0.001 ≤ b ≤ 0.1.
[Chemical Formula 17] LiaMn2GbO4
wherein, in the above formula, 0.90 ≤ a ≤ 1.1 and 0.001 ≤ b ≤ 0.1.
[Chemical Formula 18] QO2
[Chemical Formula 19] QS2
[Chemical Formula 20] LiQS2
[Chemical Formula 21] V2O5
[Chemical Formula 22] LiV2O5
[Chemical Formula 23] LiIO2
[Chemical Formula 24] LiNiVO4
[Chemical Formula 25] Li3-fJ2(PO4)3 (0 ≤ f ≤ 3)
[Chemical Formula 26] Li3-fFe2(PO4)3 (0 ≤ f ≤ 2)
- In the
above Chemical Formulas 3 to 26, A is selected from the group consisting of Ni, Co, Mn, and combinations thereof; B is selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, and combinations thereof; D is selected from the group consisting of O, F, S, P, and combinations thereof; E is selected from the group consisting of Co, Mn and combinations thereof; F is selected from the group consisting of F, S, P, and combinations thereof; G is selected from the group consisting of Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, a lanthanide element, and combinations thereof, Q is selected from the group consisting of Ti, Mo, Mn, and combinations thereof; I is selected from the group consisting of Cr, V, Fe, Sc, Y, and combinations thereof; and J is selected from the group consisting of V, Cr, Mn, Co, Ni, Cu, and combinations thereof. - The electrolyte includes a non-aqueous organic solvent and a lithium salt.
- The lithium salt is dissolved in the non-aqueous organic solvent to supply lithium ions in the battery. It may operate a basic operation of a rechargeable lithium battery, and it facilitates transmission of lithium ions between positive and negative electrodes. Non-limiting examples of the lithium salt include at least one supporting electrolyte salt selected from the group consisting of LiPF6, LiBF4, LiSbF6, LiAsF6, LiCF3SO3, LiN(SO2C2F5)2, LiN (CF3SO2)2, LiC4F9SO3, LiClO4, LiAlO2, LiAlCl4, LiN(CxF2x+1SO2)(CyF2y+1SO2) (where x and y are natural numbers), LiCl, LiI, and lithium bisoxalate borate. The lithium salt may be used at a 0.1 to 2.0M concentration. When the lithium salt concentration is less than 0.1M, electrolyte performance may be deteriorated due to low electrolyte conductivity, whereas when it is more than 2.0M, lithium ion mobility may be reduced due to an increase of electrolyte viscosity.
- The non-aqueous organic solvent acts as a medium for transmitting ions taking part in the electrochemical reaction of the battery. The non-aqueous organic solvent may include, but is not limited to, benzene, toluene, fluorobenzene, 1,2-difluorobenzene, 1,3-difluorobenzene, 1,4-difluorobenzene, 1,2,3-trifluorobenzene, 1,2,4-trifluorobenzene, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, iodobenzene, 1,2-diiodobenzene, 1,3-diiodobenzene, 1,4-diiodobenzene, 1,2,3-triiodobenzene, 1,2,4-triiodobenzene, fluorotoluene, 1,2-difluorotoluene, 1,3-difluorotoluene, 1,4-difluorotoluene, 1,2,3-trifluorotoluene, 1,2,4-trifluorotoluene, chlorotoluene, 1,2-dichlorotoluene, 1,3-dichlorotoluene, 1,4-dichlorotoluene, 1,2,3-trichlorotoluene, 1,2,4-trichlorotoluene, iodotoluene, 1,2-diiodotoluene, 1,3-diiodotoluene, 1,4-diiodotoluene, 1,2,3-triiodotoluene, 1,2,4-triiodotoluene, R-CN (wherein R is a C2 to C50 linear, branched, or cyclic hydrocarbon, a double bond, an aromatic ring, or an ether bond), dimethylformamide, dimethylacetate, xylene, cyclohexane, tetrahydrofuran, 2-methyltetrahydrofuran, cyclohexanone, ethanol, isopropyl alcohol, dimethyl carbonate, ethylmethyl carbonate, diethyl carbonate, methylpropyl carbonate, propyl carbonate, methyl propionate, ethyl propionate, methyl acetate, ethyl acetate, propyl acetate, dimethoxyethane, 1,3-dioxolan, diglyme, tetraglyme, ethylene carbonate, propylene carbonate, γ-butyrolactone, sulfolane, valerolactone, decanolide, and mevalolactone. The non-aqueous organic solvent may be used singularly or in a mixture. When the organic solvent is used in a mixture, a mixing ratio can be controlled in accordance with a desirable cell performance.
- FIGURE 2 shows a rechargeable lithium battery having the above-mentioned structure according to an embodiment. Referring to FIGURE 2, the
rechargeable lithium battery 3 is composed of anelectrode assembly 4 including apositive electrode 5, anegative electrode 6, aseparator 7 interposed between thepositive electrode 5 and thenegative electrode 6 which is positioned in a battery case 8. The upper part of the cell case is sealed with acap plate 11 and agasket 12. The rechargeable lithium battery according to the present embodiment is not limited to the above-mentioned shape, and may be shaped into a prismatic shape, a pouch, and so on. - The rechargeable lithium battery generally includes a positive electrode, a negative electrode, and an electrolyte. The battery may further include a separator as needed. The separator may include any material used in conventional lithium secondary batteries. Non-limiting examples of suitable separator materials include polyethylene, polypropylene, polyvinylidene fluoride, and multi-layers thereof such as a polyethylene/polypropylene double-layered separator, a polyethylene/polypropylene/polyethylene three-layered separator, and a polypropylene/polyethylene/polypropylene three-layered separator.
- The following examples illustrate the present invention in more detail. However, it is understood that the present invention is not limited by these examples.
- 1 g of silicon (10 mm) as a core material and 100 mL of ethanol were added into a reactor and uniformly dispersed. Then, 0.2 M aqueous ammonia prepared by mixing ammonia and water in a volume ratio of 29 : 71 was added to the dispersion. They were then uniformly mixed to prepare a core liquid.
-
- The prepared precursor liquid was rapidly added to the core liquid to perform a hydrolysis and condensation reaction.
- Next, the reaction solution was heated at 60 °C to volatilize ethanol, and then heat-treated at 450 °C to prepare a negative active material including a 8 nm-thick coating layer on the surface of silicon. The coating layer included as a core Si-O- was bounded with the core material, and a p-methyl phenyl group was positioned on a Si side chain that was not bonded with the core material.
- A negative active material was prepared to have a 12 nm-thick coating layer on the surface of the silicon according to the same method as in Example 1, except that 30 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- A negative active material was prepared to have a 19 nm-thick coating layer on the surface of the silicon according to the same method as in Example 1, except that 50 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- A negative active material was prepared to have a 9 nm-thick coating layer according to the same method as in Example 1, except that Li1.1Ti0.1V0.9O2 (10 mm) was used as a core material instead of silicon.
- A negative active material was prepared to have an 11 nm-thick coating layer according to the same method as in Example 4, except that 30 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- A negative active material was prepared to have a 20 nm-thick coating layer according to the same method as in Example 4, except that 50 parts by weight of an organic-inorganic hybrid precursor was used based on 100 parts by weight of a core material.
- Silicon was used as a negative active material.
- Li1.1Ti0.1V0.9O2 was used as a negative active material.
- The negative active material prepared according to the Example 1 was examined regarding structure of the coating layer by measuring FT-IR (Fourier Transform Infrared Spectroscopy) spectra. The results are shown in FIGURE 3.
- FIGURE 3 showed FT-IR spectra of the negative active material prepared according to Example 1.
- Referring to FIGURE 3, it had a Si-O peak around 1110 cm-1. This means that the coating layer on the surface of negative active material prepared according to Example 1 had a -O-Si-O reticular structure formed from an organic-inorganic hybrid precursor.
- A lithium cobalt oxide (LiCoO2) positive active material and carbon black as a conductive agent were mixed to prepare a mixture. Next, a polyvinylidene fluoride binder was dissolved in an N-methyl-2-pyrrolidone solvent to prepare a binder solution. Then, the mixture was added to the binder solution to prepare a positive active material slurry.
- The prepared positive active material slurry was coated to be 20µm thick on an aluminum foil in a doctor blade method, dried at 120 °C for 10 hours under a vacuum atmosphere to volatilize N-methyl-2-pyrrolidone, and pressed to fabricate a positive electrode.
- Likewise, the negative active materials prepared according to Examples 1 to 6 and carbon black conductive agents were added to an N-methylpyrrolidone solution, in which a polyvinylidene fluoride binder was dissolved, to prepare negative active material slurries.
- The prepared negative active material slurries were respectively coated to be 12µm thick on a copper foil in a doctor blade method, dried at 120 °C for 10 hours under a vacuum atmosphere to volatilize N-methyl-2-pyrrolidone, and pressed to fabricate negative electrodes.
- Then, rechargeable lithium battery cells were fabricated using the positive and negative electrodes and a polyolefin (polyethylene and polypropylene) separator.
- The rechargeable lithium battery cells including the negative active materials according to the Examples 1 to 6 and Comparative Examples 1 and 2 were charged up to 4.2 V and discharged down to 2.75 V at 0.2C. Then, their coulomb efficiency was measured to estimate their initial reversible efficiency. The results are shown in the following Table 1.
Table 1 Coulomb Efficiency Example 1 80.5 % Example 2 81.8 % Example 3 77.0% Example 4 91.8% Example 5 90.0% Example 6 87.5% Comparative Example 1 72.0% Comparative Example 2 86.0% - As shown in the Table 1, the battery cells according to Examples 1 to 3 of the present invention had high coulomb efficiency compared with the battery cell according to Comparative Example 1. The same results were obtained when the battery cells according to Examples 4 to 6 were compared with that of Comparative Example 2. As a result, a negative active material of the present invention includes an inorganic oxide coating layer on the surface, and can thereby minimize interface reactivity between a negative electrode and an electrolyte during the operation of a battery cell, improving charge and discharge efficiency and cycle-life characteristic of a rechargeable lithium battery cell.
- The rechargeable lithium battery cells including the negative active materials according to the Examples 2 and 4 and Comparative Examples 1 and 2 were charged up to 4.2 V at 0.2C and discharged up to 3.0 V at 0.2C. The charge and discharge was 50 times repeated. The results are shown in the FIGURE 4. Herein, capacity retention after 50th charge and discharge means the ratio of the 50th charge and discharge capacity verse the first charge and discharge capacity.
- FIGURE 4 is a graph showing capacity retention of the cells of Examples 2 and 4 and Comparative Examples 1 and 2 during 50 charges and discharges.
Referring to FIGURE 4, the battery cells according to Examples 2 and 4 of the present invention, which included a negative active material including a coating layeron the surface after 50 charges and discharges, turned out to have a lower decreasing capacity rate than the ones according to Comparative Examples 1 and 2. - Therefore, a negative active material for a rechargeable lithium battery according to the present invention can be applied along with an aqueous binder, and improve high capacity, good cycle-life, and particularly high capacity during charge and discharge at a high rate.
- While this invention has been described in connection with the foregoing exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
Claims (26)
- A negative active material for a rechargeable lithium battery, comprising:a core comprising an active material capable of performing reversible electrochemical oxidation and reduction; and
a coating layer on a surface of the core, the coating layer having a reticular structure including -O-M-O- wherein M is selected from the group consisting of Si, Ti, Zr, Al, and combinations thereof, and an organic functional group linked to M as a side chain, the organic functional group selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof. - The negative active material of claim 1, wherein the organic functional group is an aryl group substituted by at least one functional group selected from the group consisting of an alkyl group and a haloalkyl group.
- The negative active material of claim 1, wherein the organic functional group is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof.
- The negative active material of claim 3, wherein the organic functional group is an aryl group selected from the group consisting of benzyl, phenyl, and tolyl.
- The negative active material of any one of claims 1 to 4, wherein the coating layer has a thickness of 20 nm or less.
- The negative active material of any one of the preceding claims, wherein the active material is selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, and a material capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- The negative active material of claim 6, wherein the active material is selected from the group consisting of crystalline carbon, amorphous carbon, Si, silicon oxide, Sn, tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, lithium vanadium oxide, and a lithium-containing alloy including at least one metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe and Sn.
- The negative active material of claim 7, wherein the active material is a compound represented by Formula 1:
LixM'yVzO2+d (1)
wherein 0.1≤x≤2.5, 0≤y≤0.5, 0.5≤z≤1.5, 0≤d≤0.5, and M' of Formula 1 is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof. - The negative active material of any one of the preceding claims, wherein the coating layer is comprised of a hydrolysis and condensation product of a compound represented by Formula 2:
R1-M-(OR2)n (2)
wherein M of Formula 2 is selected from the group consisting of Si, Ti, Zr, and Al, R1 is the organic functional group, R2 is, in each case independently, a C1 to C7 alkyl group, and n is determined according to the valence of M. - A method of preparing a negative active material for a rechargeable lithium battery, comprising:preparing a core liquid by mixing an active material capable of performing reversible electrochemical oxidation and reduction, an organic solvent, a base, and water;preparing a precursor liquid comprising an organic-inorganic hybrid precursor represented by Formula 2, an organic solvent, and water;
R1-M-(OR2)n (2)
wherein M of Formula 2 is selected from the group consisting of Si, Ti, Zr, and Al, R1 is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof, R2 is, in each case independently, a C1 to C7 alkyl group, and n is determined according to the valence of M;mixing the core liquid and the precursor liquid; andvolatilizing the organic solvent and heat-treating the mixed core liquid and precursor liquid to obtain the negative active material. - The method of claim 10, wherein the organic functional group is an aryl group substituted by at least one functional group selected from the group consisting of an alkyl group and a haloalkyl group.
- The method of claim 10, wherein R1 is selected from the group consisting of a C1 to C10 alkyl group, a C1 to C10 haloalkyl group, a C6 to C12 aryl group, a C6 to C12 aryl group substituted by at least one C1 to C10 alkyl group, a C6 to C12 aryl group substituted by at least one C1 to C10 haloalkyl group, and combinations thereof, and R2 is a C1 to C5 alkyl group.
- The method of any one of claims 10 to 13, wherein the base is aqueous ammonia.
- The method of any one of claims 10 to 14, wherein the organic-inorganic hybrid precursor is used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the active material.
- The method of any one of claims 10 to 15, wherein the active material is used in an amount of 1 to 10 g based on 1,000 ml of the organic solvents in the mixture of the core liquid and the precursor liquid, the base is used at a concentration of 0.05 to 1 M, and the water is used at a concentration of 10 to 20 M in the mixture of the core liquid and the precursor liquid.
- The method of any one of claims 10 to 16, wherein the active material is a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, a lithium metal, a lithium-containing alloy, and a material being capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- The method of claim 17, wherein the active material is selected from the group consisting of crystalline carbon; amorphous carbon; Si, silicon oxide, Sn, tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, lithium vanadium oxide, and a lithium-containing alloy including at least one metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe and Sn.
- The method of claims 17 or 18, wherein the active material is a compound represented by Formula 1:
LixM'yVzO2+d (1)
wherein 0.1 ≤ x ≤ 2.5, 0 ≤ y ≤ 0.5, 0.5 ≤ z ≤ 1.5, 0 ≤ d ≤ 0.5, and M' of Formula 1 is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof. - A rechargeable lithium battery comprising:a negative electrode comprising:a negative active material comprising:a core comprising an active material capable of performing reversible electrochemical oxidation and reduction; anda coating layer on a surface of the core, the coating layer having a reticular structure including -O-M-O- wherein M is selected from the group consisting of Si, Ti, Zr, Al, and combinations thereof, and an organic functional group linked to M as a side chain, the organic functional group selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof;
a positive electrode comprising a positive active material; and
an electrolyte. - The rechargeable lithium battery of claim 20, wherein the organic functional group is an aryl group substituted by at least one functional group selected from the group consisting of an alkyl group and a haloalkyl group.
- The rechargeable lithium battery of claims 20 or 21, wherein the coating layer has a thickness of 20 nm or less.
- The rechargeable lithium battery of claims 20, 21 or 22, wherein the active material is a material selected from the group consisting of a material capable of reversibly intercalating and deintercalating lithium ions, lithium metal, a lithium-containing alloy, a material capable of reversibly forming a lithium-containing compound by reacting with lithium ions.
- The rechargeable lithium battery of claim 23, wherein the active material is selected from the group consisting of crystalline carbon; amorphous carbon; Si, silicon oxide, Sn, tin oxide, a tin alloy composite, a transition element oxide, a lithium metal nitride, lithium vanadium oxide, and a lithium-containing alloy including at least one metal selected from the group consisting of Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Fe and Sn.
- The rechargeable lithium battery of claims 23 or 24, wherein the active material is a compound represented by Formula 1:
LixM'yVzO2+d (1)
wherein 0.1 ≤ x ≤ 2.5, 0 ≤ y ≤ 0.5, 0.5 ≤ z ≤ 1.5, 0 ≤ d ≤ 0.5, and M' of Formula 1 is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof. - Use of a negative active material as claimed in any one of claims 1 to 9 for an electrode of a rechargeable lithium battery.
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GB0601318D0 (en) | 2006-01-23 | 2006-03-01 | Imp Innovations Ltd | Method of etching a silicon-based material |
GB0601319D0 (en) | 2006-01-23 | 2006-03-01 | Imp Innovations Ltd | A method of fabricating pillars composed of silicon-based material |
KR100759410B1 (en) * | 2006-11-20 | 2007-09-19 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery, method of preparing same, and lithium secondary battery comprising same |
KR100814880B1 (en) * | 2006-11-22 | 2008-03-18 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing thereof, and rechargeable lithium battery comprising the same |
KR100778450B1 (en) | 2006-11-22 | 2007-11-28 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same |
KR100805123B1 (en) * | 2007-02-15 | 2008-02-21 | 삼성에스디아이 주식회사 | Lithium secondary battery |
KR100953615B1 (en) * | 2007-04-13 | 2010-04-20 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery |
GB0709165D0 (en) | 2007-05-11 | 2007-06-20 | Nexeon Ltd | A silicon anode for a rechargeable battery |
JP5511128B2 (en) * | 2007-06-07 | 2014-06-04 | 三星エスディアイ株式会社 | Anode material for non-aqueous secondary battery and non-aqueous secondary battery |
GB0713896D0 (en) * | 2007-07-17 | 2007-08-29 | Nexeon Ltd | Method |
GB0713898D0 (en) | 2007-07-17 | 2007-08-29 | Nexeon Ltd | A method of fabricating structured particles composed of silcon or a silicon-based material and their use in lithium rechargeable batteries |
GB0713895D0 (en) * | 2007-07-17 | 2007-08-29 | Nexeon Ltd | Production |
KR100898291B1 (en) * | 2007-09-12 | 2009-05-18 | 삼성에스디아이 주식회사 | Rechargeable lithium battery |
US8276695B2 (en) * | 2007-12-25 | 2012-10-02 | Byd Co. Ltd. | Battery electrode sheet |
KR101101148B1 (en) | 2008-01-18 | 2012-01-05 | 주식회사 엘지화학 | Process for Preparing Electrode of Improved Productability |
GB2464157B (en) | 2008-10-10 | 2010-09-01 | Nexeon Ltd | A method of fabricating structured particles composed of silicon or a silicon-based material |
GB2464158B (en) | 2008-10-10 | 2011-04-20 | Nexeon Ltd | A method of fabricating structured particles composed of silicon or a silicon-based material and their use in lithium rechargeable batteries |
CN101771146B (en) * | 2009-01-07 | 2012-08-29 | 清华大学 | Lithium ion battery anode material and preparation method thereof |
GB2470056B (en) | 2009-05-07 | 2013-09-11 | Nexeon Ltd | A method of making silicon anode material for rechargeable cells |
GB2470190B (en) | 2009-05-11 | 2011-07-13 | Nexeon Ltd | A binder for lithium ion rechargeable battery cells |
US9853292B2 (en) | 2009-05-11 | 2017-12-26 | Nexeon Limited | Electrode composition for a secondary battery cell |
US8076026B2 (en) * | 2010-02-05 | 2011-12-13 | International Battery, Inc. | Rechargeable battery using an aqueous binder |
US7931985B1 (en) | 2010-11-08 | 2011-04-26 | International Battery, Inc. | Water soluble polymer binder for lithium ion battery |
US8753545B2 (en) | 2010-03-03 | 2014-06-17 | 3M Innovative Properties Company | Composite negative electrode materials |
GB201005979D0 (en) | 2010-04-09 | 2010-05-26 | Nexeon Ltd | A method of fabricating structured particles composed of silicon or a silicon-based material and their use in lithium rechargeable batteries |
GB201009519D0 (en) | 2010-06-07 | 2010-07-21 | Nexeon Ltd | An additive for lithium ion rechargeable battery cells |
US20110143206A1 (en) * | 2010-07-14 | 2011-06-16 | International Battery, Inc. | Electrode for rechargeable batteries using aqueous binder solution for li-ion batteries |
US8102642B2 (en) * | 2010-08-06 | 2012-01-24 | International Battery, Inc. | Large format ultracapacitors and method of assembly |
GB201014707D0 (en) | 2010-09-03 | 2010-10-20 | Nexeon Ltd | Electroactive material |
GB201014706D0 (en) | 2010-09-03 | 2010-10-20 | Nexeon Ltd | Porous electroactive material |
CN102169996B (en) * | 2011-03-31 | 2013-01-23 | 湖南工业大学 | Micro-sphere compound anode material with core-shell structure and preparation method thereof |
KR101243913B1 (en) | 2011-04-07 | 2013-03-14 | 삼성에스디아이 주식회사 | Anode active material, anode and lithium battery containing the same, and preparation method thereof |
KR101201807B1 (en) * | 2011-08-31 | 2012-11-15 | 삼성에스디아이 주식회사 | Lithium secondary battery |
KR101511822B1 (en) | 2012-05-30 | 2015-04-13 | 주식회사 엘지화학 | Negative active material for lithium battery and battery comprising the same |
KR101438570B1 (en) * | 2012-11-14 | 2014-09-12 | 한국에너지기술연구원 | Synthesis Method of Electrode Active Material with Core-Shell Structure |
EP2980884B1 (en) * | 2013-03-26 | 2017-11-01 | Nissan Motor Co., Ltd | Non-aqueous electrolyte secondary battery |
US10217983B2 (en) | 2013-07-26 | 2019-02-26 | Lg Chem, Ltd. | Cross-linked compound particle and secondary battery including the same |
CN104466232A (en) * | 2013-09-24 | 2015-03-25 | 华为技术有限公司 | Lithium-ion battery and preparation method of lithium metal alloy |
FR3017244A1 (en) * | 2014-01-31 | 2015-08-07 | Commissariat Energie Atomique | ELECTRODE MATERIAL, PROCESS FOR PREPARATION AND USE IN LITHIUM ACCUMULATOR |
CN107785562B (en) * | 2016-08-31 | 2021-01-01 | 比亚迪股份有限公司 | Negative electrode active material, preparation method thereof, negative electrode material, negative electrode and lithium ion battery |
CN106410161A (en) * | 2016-11-17 | 2017-02-15 | 湖南工业大学 | Composite microsphere negative electrode material with core-shell structure, preparation method and application of composite microsphere negative electrode material |
US10530009B2 (en) * | 2017-03-22 | 2020-01-07 | Ford Global Technologies, Llc | Solid state battery |
KR20210133085A (en) * | 2020-04-28 | 2021-11-05 | 삼성에스디아이 주식회사 | All-solid-state secondary battery |
CN112786871B (en) * | 2021-02-18 | 2022-03-29 | Oppo广东移动通信有限公司 | Silicon-based negative electrode material, preparation method thereof, negative electrode, battery and electronic equipment |
CN114914396B (en) * | 2022-07-18 | 2022-11-08 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1511101A2 (en) * | 2003-08-21 | 2005-03-02 | Samsung SDI Co., Ltd. | Negative active material for non-aqueous electrolyte battery, method of preparing same, and non-aqueous electrolyte battery comprising same |
US20060088766A1 (en) | 2004-10-27 | 2006-04-27 | Samsung Sdi Co., Ltd. | Negative active material for non-aqueous electrolyte battery, method of preparing same and non-aqueous electrolyte battery |
Family Cites Families (114)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5920971A (en) | 1982-07-26 | 1984-02-02 | Sanyo Electric Co Ltd | Secondary battery with organic electrolyte |
US5284721A (en) * | 1990-08-01 | 1994-02-08 | Alliant Techsystems Inc. | High energy electrochemical cell employing solid-state anode |
US5478671A (en) * | 1992-04-24 | 1995-12-26 | Fuji Photo Film Co., Ltd. | Nonaqueous secondary battery |
JP3242751B2 (en) | 1992-04-24 | 2001-12-25 | 富士写真フイルム株式会社 | Non-aqueous secondary battery |
US5378560A (en) * | 1993-01-21 | 1995-01-03 | Fuji Photo Film Co., Ltd. | Nonaqueous secondary battery |
JP3010226B2 (en) * | 1993-03-10 | 2000-02-21 | セイコーインスツルメンツ株式会社 | Non-aqueous electrolyte secondary battery and method of manufacturing the same |
JPH06275265A (en) | 1993-03-19 | 1994-09-30 | Seiko Instr Inc | Nonaqueous electrolyte secondary battery |
JP3169102B2 (en) | 1993-04-14 | 2001-05-21 | セイコーインスツルメンツ株式会社 | Non-aqueous electrolyte secondary battery |
JPH06325791A (en) | 1993-05-14 | 1994-11-25 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
JPH0714580A (en) | 1993-06-25 | 1995-01-17 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
WO1995002001A1 (en) | 1993-07-06 | 1995-01-19 | Philips Electronics N.V. | Method of preparing a composite material comprising a silica network and chains of a polyhydroxy compound and a liquid crystal display device having a top coat of such material |
JPH0729600A (en) | 1993-07-12 | 1995-01-31 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
JPH0729608A (en) | 1993-07-13 | 1995-01-31 | Fuji Photo Film Co Ltd | Non-aqueous secondary battery |
JPH07122298A (en) | 1993-10-21 | 1995-05-12 | Fuji Photo Film Co Ltd | Method for electrically charging/discharging non-aqueous secondary battery |
JP3359164B2 (en) | 1994-10-19 | 2002-12-24 | キヤノン株式会社 | Rechargeable battery |
JPH08241707A (en) | 1995-03-06 | 1996-09-17 | Res Dev Corp Of Japan | Secondary battery using oxide thin film as negative electrode active material |
US5851696A (en) | 1996-01-29 | 1998-12-22 | Valence Technology, Inc. | Rechargeable lithium battery |
US5705291A (en) * | 1996-04-10 | 1998-01-06 | Bell Communications Research, Inc. | Rechargeable battery cell having surface-treated lithiated intercalation positive electrode |
US5700598A (en) * | 1996-07-11 | 1997-12-23 | Bell Communications Research, Inc. | Method for preparing mixed amorphous vanadium oxides and their use as electrodes in reachargeable lithium cells |
US6071489A (en) * | 1996-12-05 | 2000-06-06 | Samsung Display Device Co., Ltd. | Methods of preparing cathode active materials for lithium secondary battery |
JPH10188977A (en) | 1996-12-25 | 1998-07-21 | Mitsubishi Chem Corp | Lithium secondary battery |
JP3596578B2 (en) | 1997-03-26 | 2004-12-02 | 株式会社ユアサコーポレーション | Non-aqueous electrolyte secondary battery |
JP3829410B2 (en) | 1997-06-05 | 2006-10-04 | 宇部興産株式会社 | Anode material for non-aqueous battery and production method thereof |
US5879691A (en) * | 1997-06-06 | 1999-03-09 | The Procter & Gamble Company | Delivery system for a tooth whitener using a strip of material having low flexural stiffness |
JP3994238B2 (en) | 1997-12-18 | 2007-10-17 | 宇部興産株式会社 | Nonaqueous electrolyte lithium secondary battery |
US6517974B1 (en) * | 1998-01-30 | 2003-02-11 | Canon Kabushiki Kaisha | Lithium secondary battery and method of manufacturing the lithium secondary battery |
CN1146062C (en) * | 1998-02-10 | 2004-04-14 | 三星电管株式会社 | Active material for positive electrode used in lithium secondary battery and method of manufacturing same |
US6967183B2 (en) * | 1998-08-27 | 2005-11-22 | Cabot Corporation | Electrocatalyst powders, methods for producing powders and devices fabricated from same |
JP3949303B2 (en) | 1998-03-20 | 2007-07-25 | 三星エスディアイ株式会社 | Carbon material for negative electrode of lithium secondary battery and lithium secondary battery using the same |
JPH11273678A (en) | 1998-03-23 | 1999-10-08 | Sumitomo Metal Mining Co Ltd | Positive electrode active material for nonaqueous electrolyte secondary battery, its manufacture, and nonaqueous electrolyte secondary battery using positive electrode active material |
JP4187347B2 (en) * | 1998-04-02 | 2008-11-26 | 三星エスディアイ株式会社 | Method for producing negative electrode active material for lithium ion battery |
JPH11354104A (en) | 1998-04-09 | 1999-12-24 | Denso Corp | Nonaqueous electrolyte secondary battery and manufacture for electrode |
KR100274236B1 (en) * | 1998-05-13 | 2001-02-01 | 김순택 | Cathode active material for lithium secondary battery and method for producing the same |
US6221531B1 (en) * | 1998-07-09 | 2001-04-24 | The University Of Chicago | Lithium-titanium-oxide anodes for lithium batteries |
JP3960691B2 (en) | 1998-09-10 | 2007-08-15 | 三菱化学株式会社 | Anode active material for non-aqueous carbon-coated lithium secondary battery |
KR100298146B1 (en) | 1999-03-13 | 2001-09-26 | 박호군 | Anode active material for lithium secondary batteries and its fabricating method |
JP2000299132A (en) | 1999-04-16 | 2000-10-24 | Nippon Steel Corp | Gel electrolyte secondary battery |
JP2001006683A (en) * | 1999-06-23 | 2001-01-12 | Toyota Central Res & Dev Lab Inc | Active material for lithium battery |
CN1171333C (en) | 1999-12-15 | 2004-10-13 | 北京有色金属研究总院 | Composite graphite negative electrode material for lithium cell and its preparation method |
US6316143B1 (en) * | 1999-12-22 | 2001-11-13 | The United States Of America As Represented By The Secretary Of The Army | Electrode for rechargeable lithium-ion battery and method of fabrication |
JP3517698B2 (en) * | 2000-03-03 | 2004-04-12 | 独立行政法人産業技術総合研究所 | Nanoparticle dispersed structure and laminate thereof |
JP4767428B2 (en) | 2000-03-07 | 2011-09-07 | パナソニック株式会社 | Nonaqueous electrolyte secondary battery |
US6482537B1 (en) * | 2000-03-24 | 2002-11-19 | Honeywell International, Inc. | Lower conductivity barrier coating |
DE10014884A1 (en) | 2000-03-24 | 2001-09-27 | Merck Patent Gmbh | Coated lithium mixed oxide particles and a process for their production |
JP2001297796A (en) * | 2000-04-13 | 2001-10-26 | Kyocera Corp | Lithium secondary cell |
JP2001325950A (en) | 2000-05-15 | 2001-11-22 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolyte secondary cell and negative electrode of the same |
JP2001325964A (en) * | 2000-05-19 | 2001-11-22 | Ne Chemcat Corp | Electrode catalyst for solid polymer electrolyte fuel cell |
JP4137350B2 (en) | 2000-06-16 | 2008-08-20 | 三星エスディアイ株式会社 | Negative electrode material for lithium secondary battery, electrode for lithium secondary battery, lithium secondary battery, and method for producing negative electrode material for lithium secondary battery |
KR100378014B1 (en) | 2000-08-21 | 2003-03-29 | 삼성에스디아이 주식회사 | Electrode for lithium secondary batteries and lithium secondary batteries |
JP2002110243A (en) * | 2000-09-29 | 2002-04-12 | Pionics Co Ltd | Lithium secondary battery |
US7387851B2 (en) * | 2001-07-27 | 2008-06-17 | A123 Systems, Inc. | Self-organizing battery structure with electrode particles that exert a repelling force on the opposite electrode |
JP2002216753A (en) | 2001-01-15 | 2002-08-02 | Sumitomo Metal Ind Ltd | Lithium secondary battery, negative electrode material for the same and manufacturing method of the same |
US8252465B2 (en) * | 2001-01-19 | 2012-08-28 | Samsung Sdi Co., Ltd. | Electrolyte for lithium secondary battery and lithium secondary battery comprising same |
WO2002061864A1 (en) | 2001-01-31 | 2002-08-08 | Korea Institute Of Science And Technology | A lithium electrode comprising surface-treated lithium particles, its fabrication method and lithium battery comprising the same |
JP2003068305A (en) | 2001-03-01 | 2003-03-07 | Sumitomo Metal Ind Ltd | Negative material for secondary lithium battery and its manufacturing method |
US6821677B2 (en) * | 2001-03-29 | 2004-11-23 | Kabushiki Kaisha Toshiba | Negative electrode active material and nonaqueous electrolyte battery |
JP5000811B2 (en) | 2001-04-27 | 2012-08-15 | チタン工業株式会社 | Lithium titanate powder and its use |
JP2002326818A (en) | 2001-05-08 | 2002-11-12 | Mitsubishi Chemicals Corp | Production method of slurry and production method of lithium transition metal compound oxide |
JP4968702B2 (en) | 2001-05-21 | 2012-07-04 | 日立マクセルエナジー株式会社 | Solid electrolyte and polymer solid electrolyte battery |
JP3974756B2 (en) | 2001-06-05 | 2007-09-12 | 株式会社日本触媒 | Method for producing metal oxide particles |
US6730437B2 (en) * | 2001-06-19 | 2004-05-04 | Wilson Greatbatch Ltd. | Anode for nonaqueous secondary electrochemical cells |
US6926992B2 (en) * | 2001-06-29 | 2005-08-09 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
US6878487B2 (en) * | 2001-09-05 | 2005-04-12 | Samsung Sdi, Co., Ltd. | Active material for battery and method of preparing same |
KR100413800B1 (en) * | 2001-10-17 | 2004-01-03 | 삼성에스디아이 주식회사 | Fluoride copolymer, polymer electrolyte comprising the same and lithium battery employing the polymer electrolyte |
KR100420024B1 (en) * | 2001-10-17 | 2004-02-25 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery and method of preparing same |
WO2003038931A1 (en) | 2001-10-29 | 2003-05-08 | Matsushita Electric Industrial Co., Ltd. | Lithium ion secondary battery |
JP4712302B2 (en) * | 2001-12-21 | 2011-06-29 | マサチューセッツ インスティテュート オブ テクノロジー | Conductive lithium storage electrode |
JP4042413B2 (en) | 2002-01-11 | 2008-02-06 | 株式会社デンソー | battery |
US20030215700A1 (en) * | 2002-04-04 | 2003-11-20 | Kenichiro Hosoda | Nonaqueous electrolyte secondary battery |
US20040175622A9 (en) * | 2002-04-29 | 2004-09-09 | Zhendong Hu | Method of preparing electrode composition having a carbon-containing-coated metal oxide, electrode composition and electrochemical cell |
KR101107041B1 (en) | 2002-05-08 | 2012-01-25 | 가부시키가이샤 지에스 유아사 | Nonaqueous electrolyte secondary cell |
KR100449073B1 (en) | 2002-10-15 | 2004-09-18 | 한국전자통신연구원 | Cathode material for lithium secondary batteries and method for manufacturing the Same |
JP2004149391A (en) | 2002-10-31 | 2004-05-27 | Nippon Shokubai Co Ltd | Composition for forming metal oxide film |
JP4025995B2 (en) * | 2002-11-26 | 2007-12-26 | 信越化学工業株式会社 | Nonaqueous electrolyte secondary battery negative electrode material, method for producing the same, and lithium ion secondary battery |
US7491467B2 (en) * | 2002-12-17 | 2009-02-17 | Mitsubishi Chemical Corporation | Negative electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery using the same |
CN1194431C (en) | 2002-12-30 | 2005-03-23 | 北大先行科技产业有限公司 | Prepn of composite negative-pole graphite material for lithium ion battery, negative pole and battery |
KR20040082803A (en) * | 2003-03-20 | 2004-09-30 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery and method of preparing same |
JP4171897B2 (en) | 2003-04-24 | 2008-10-29 | 信越化学工業株式会社 | Anode material for non-aqueous electrolyte secondary battery and method for producing the same |
KR100497251B1 (en) | 2003-08-20 | 2005-06-23 | 삼성에스디아이 주식회사 | Protective composition for negative electrode of lithium sulfur battery and lithium sulfur battery fabricated by using same |
KR100570649B1 (en) | 2004-01-26 | 2006-04-12 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery and rechargeable lithium battery |
KR100560537B1 (en) | 2003-08-21 | 2006-03-15 | 삼성에스디아이 주식회사 | Negative active material for non-aqueous electrolyte battery, method of preparing same, and non-aqueous electrolyte battery |
JP4761239B2 (en) | 2003-10-31 | 2011-08-31 | 日立マクセルエナジー株式会社 | Non-aqueous secondary battery electrode material, method for producing the same, and non-aqueous secondary battery using the same |
JP4400190B2 (en) | 2003-11-27 | 2010-01-20 | 株式会社豊田中央研究所 | Method for producing negative electrode active material |
KR20050052268A (en) | 2003-11-29 | 2005-06-02 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery, method of preparing same, and lithium secondary battery comprising same |
KR100570648B1 (en) * | 2004-01-26 | 2006-04-12 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery, method of preparing same, and lithium secondary battery comprising same |
JP4022889B2 (en) | 2004-02-12 | 2007-12-19 | ソニー株式会社 | Electrolyte and battery |
JP4765282B2 (en) | 2004-08-24 | 2011-09-07 | 株式会社豊田中央研究所 | Negative electrode active material for aqueous lithium secondary battery, method for producing the same, and aqueous lithium secondary battery |
JP4245532B2 (en) | 2004-08-30 | 2009-03-25 | 株式会社東芝 | Nonaqueous electrolyte secondary battery |
KR100838165B1 (en) | 2004-09-24 | 2008-06-13 | 주식회사 엘지화학 | Titanium Compound-Coated Cathode Active Material And Lithium Secondary Battery Comprising The Same |
CN1284256C (en) | 2004-12-16 | 2006-11-08 | 武汉理工大学 | Surface decorated nano LiMVO4 plus plat material and decoration method |
KR100657951B1 (en) * | 2005-02-18 | 2006-12-14 | 삼성에스디아이 주식회사 | Cathode active material, method of preparing the same, and cathode and lithium battery containing the material |
KR101191636B1 (en) | 2005-02-28 | 2012-10-18 | 삼성에스디아이 주식회사 | Electrolyte for lithium battery and lithium battery comprising same |
US7682746B2 (en) | 2005-03-31 | 2010-03-23 | Panasonic Corporation | Negative electrode for non-aqueous secondary battery |
US20060236528A1 (en) * | 2005-04-25 | 2006-10-26 | Ferro Corporation | Non-aqueous electrolytic solution |
US7238453B2 (en) | 2005-04-25 | 2007-07-03 | Ferro Corporation | Non-aqueous electrolytic solution with mixed salts |
KR20070016431A (en) | 2005-08-03 | 2007-02-08 | 삼성에스디아이 주식회사 | Active material for lithium secondary battery, preparing method for the same and secondary battery with the same |
KR100749486B1 (en) * | 2005-10-31 | 2007-08-14 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing same and rechargeable lithium battery comprising same |
JP5101010B2 (en) * | 2005-12-21 | 2012-12-19 | 三星エスディアイ株式会社 | Negative electrode active material for lithium secondary battery, lithium secondary battery, and method for producing negative electrode active material for lithium secondary battery |
JP5207589B2 (en) | 2005-12-22 | 2013-06-12 | 三星エスディアイ株式会社 | Method for producing negative electrode active material for lithium secondary battery |
KR100709218B1 (en) | 2005-12-30 | 2007-04-18 | 삼성에스디아이 주식회사 | Lithium secondary battery |
JP5128779B2 (en) * | 2006-03-06 | 2013-01-23 | パナソニック株式会社 | Lithium ion secondary battery |
KR20070091938A (en) | 2006-03-08 | 2007-09-12 | 삼성에스디아이 주식회사 | Lithium secondary battery |
KR100759401B1 (en) * | 2006-11-20 | 2007-09-19 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery, method of preparing same, and lithium secondary battery comprising same |
KR100759410B1 (en) * | 2006-11-20 | 2007-09-19 | 삼성에스디아이 주식회사 | Negative active material for lithium secondary battery, method of preparing same, and lithium secondary battery comprising same |
KR100778450B1 (en) | 2006-11-22 | 2007-11-28 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same |
KR100814880B1 (en) * | 2006-11-22 | 2008-03-18 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing thereof, and rechargeable lithium battery comprising the same |
US20080182171A1 (en) * | 2006-12-18 | 2008-07-31 | Hideaki Maeda | Composition for negative electrode of non-aqueous rechargeable battery and non-aqueous rechargeable battery prepared by using same |
EP1936720B1 (en) * | 2006-12-20 | 2011-02-23 | Samsung SDI Co., Ltd. | Negative electrode and rechargeable lithium battery including the same |
US7981545B2 (en) * | 2006-12-28 | 2011-07-19 | Samsung Sdi Co., Ltd. | Negative active material for rechargeable lithium battery and rechargeable lithium battery including the same |
KR100953615B1 (en) * | 2007-04-13 | 2010-04-20 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery |
JP5511128B2 (en) * | 2007-06-07 | 2014-06-04 | 三星エスディアイ株式会社 | Anode material for non-aqueous secondary battery and non-aqueous secondary battery |
US8227114B2 (en) * | 2007-07-05 | 2012-07-24 | Samsung Sdi Co., Ltd. | Preparing method of negative active material for non-aqueous electrolyte secondary battery and negative active material prepared thereby |
KR100898291B1 (en) * | 2007-09-12 | 2009-05-18 | 삼성에스디아이 주식회사 | Rechargeable lithium battery |
US20100143800A1 (en) * | 2008-10-28 | 2010-06-10 | Samsung Sdi Co., Ltd. | Negative active material for lithium secondary battery, preparing method thereof and lithium secondary battery including the same |
-
2006
- 2006-11-22 KR KR1020060115866A patent/KR100778450B1/en active IP Right Grant
-
2007
- 2007-11-20 EP EP07121149A patent/EP1926163B1/en active Active
- 2007-11-21 US US11/984,807 patent/US8835049B2/en active Active
- 2007-11-22 JP JP2007303257A patent/JP4965412B2/en active Active
- 2007-11-22 CN CN200710169303.6A patent/CN101188287B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1511101A2 (en) * | 2003-08-21 | 2005-03-02 | Samsung SDI Co., Ltd. | Negative active material for non-aqueous electrolyte battery, method of preparing same, and non-aqueous electrolyte battery comprising same |
US20060088766A1 (en) | 2004-10-27 | 2006-04-27 | Samsung Sdi Co., Ltd. | Negative active material for non-aqueous electrolyte battery, method of preparing same and non-aqueous electrolyte battery |
Non-Patent Citations (7)
Title |
---|
AURBACH D ET AL: "BEHAVIOR OF LITHIATED GRAPHITE ELECTRODES COMPRISING SILICA BASED BINDER", JOURNAL OF APPLIED ELECTROCHEMISTRY, SPRINGER, DORDRECHT, NL, vol. 28, no. 10, October 1998 (1998-10-01), pages 1051 - 1059, XP000786929, ISSN: 0021-891X * |
AURBACH, D. ET AL., JOURNAL OF APPLIED ELECTROCHEMISTRY, vol. 28, 1998, pages 1051 - 1059 |
CHEN ET AL: "Improving the performance of soft carbon for lithium-ion batteries", ELECTROCHIMICA ACTA, ELSEVIER SCIENCE PUBLISHERS, BARKING, GB, vol. 51, no. 19, 20 May 2006 (2006-05-20), pages 3890 - 3894, XP005427738, ISSN: 0013-4686 * |
NG S B ET AL: "SI-O NETWORK ENCAPSULATED GRAPHITE-SILICON MIXTURES AS NEGATIVE ELECTRODES FOR LITHIUM-ION BATTERIES", JOURNAL OF POWER SOURCES, ELSEVIER, AMSTERDAM, NL, vol. 94, no. 1, 15 February 2001 (2001-02-15), pages 63 - 67, XP001164263, ISSN: 0378-7753 * |
OSKAM G ET AL: "SOL-GEL SYNTHESIS OF CARBON/SILICA GEL ELECTRODES FOR LITHIUM INTERCALATION", ELECTROCHEMICAL AND SOLID-STATE LETTERS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 2, no. 12, December 1999 (1999-12-01), pages 610 - 612, XP001101158, ISSN: 1099-0062 * |
OSKAM, G ET AL., ELECTROCHEMICAL AND SOLID-STATE LETTERS, vol. 2, no. 12, 1999, pages 610 - 612 |
S.B ET AL., JOURNAL OF POWER SOURCES, vol. 94, 2001, pages 63 - 67 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2343758A1 (en) * | 2009-12-24 | 2011-07-13 | Sony Corporation | Lithium-ion secondary battery, anode for lithium-ion secondary battery, power tool, electric vehicle and energy storage system |
US8999583B2 (en) | 2009-12-24 | 2015-04-07 | Sony Corporation | Lithium-ion secondary battery, anode for lithium-ion secondary battery, power tool, electric vehicle and energy storage system |
FR2955709A1 (en) * | 2010-01-28 | 2011-07-29 | Saft Groupe Sa | Electrode e.g. anode, for lithium-ion battery, has active material comprising silicon, whose surface is grafted by organic group bonded to silicon by silicon-carbide bond, where organic group is unubstituted monovalent hydrocarbon |
EP2624333A1 (en) * | 2012-02-06 | 2013-08-07 | Samsung SDI Co., Ltd. | Lithium secondary battery |
US9450223B2 (en) | 2012-02-06 | 2016-09-20 | Samsung Sdi Co., Ltd. | Lithium secondary battery |
US9437896B2 (en) | 2012-02-07 | 2016-09-06 | Samsung Sdi Co., Ltd. | Method of preparing lithium secondary battery |
JP2015518263A (en) * | 2012-05-30 | 2015-06-25 | エルジー・ケム・リミテッド | Negative electrode active material for lithium secondary battery and lithium secondary battery including the same |
US9754728B2 (en) | 2012-10-09 | 2017-09-05 | Semiconductor Energy Laboratory Co., Ltd. | Material for electrode of power storage device, power storage device, and electrical appliance |
US10483044B2 (en) | 2012-10-09 | 2019-11-19 | Semiconductor Energy Laboratory Co., Ltd. | Material for electrode of power storage device, power storage device, and electrical appliance |
Also Published As
Publication number | Publication date |
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KR100778450B1 (en) | 2007-11-28 |
JP2008130570A (en) | 2008-06-05 |
JP4965412B2 (en) | 2012-07-04 |
EP1926163B1 (en) | 2011-05-11 |
US20080118834A1 (en) | 2008-05-22 |
CN101188287B (en) | 2014-12-24 |
CN101188287A (en) | 2008-05-28 |
US8835049B2 (en) | 2014-09-16 |
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